Table 3.29 Sense Key Descriptions
Sense

Description

Key

 

 

 

0h

NO SENSE. Indicates that there is no specific sense key

 

information to be reported for the designated logical unit. This

 

would be the case for a successful command or a command that

 

received CHECK CONDITION or COMMAND

 

TERMINATED status because one of the filemark, EOM, or

 

ILI bits is set to one.

 

 

2h

NOT READY. Indicates that the logical unit addressed cannot

 

be accessed. Operator intervention may be required to correct

 

this condition.

 

 

3h

MEDIUM ERROR. Indicates that the command terminated

 

with a non-recovered error condition that was probably caused

 

by a flaw in the medium or an error in the recorded data. This

 

sense key may also be returned if the target is unable to

 

distinguish between a flaw in the medium and a specific

 

hardware failure (sense key 4h)

4h

HARDWARE ERROR. Indicates that the target detected a non-

 

recoverable hardware failure (for example, controller failure,

 

device failure parity error, etc.) while performing the command

 

or during a self test.

 

 

5h

ILLEGAL REQUEST. Indicates that there was an illegal

 

parameter in the command descriptor block or in the additional

 

parameters supplied as data for some commands (FORMAT

 

UNIT, SEARCH DATA, etc.). If the target detects an invalid

 

parameter in the command descriptor block then it shall

 

terminate the command without altering the medium. If the

 

target detects an invalid parameter in the additional parameters

 

supplied as data, then the target may have already altered the

 

medium. This sense key may also indicate that an invalid

 

INDENTIFY message was received

 

 

6h

UNIT ATTENTION. Indicates that the removable medium

 

may have been changed or the target has been reset. See ANSI

 

SCSI-2 7.9 for more detailed information about the unit

 

attention condition.

 

 

Bh

ABORTED COMMAND. Indicates that the target aborted the

 

command. The initiator may be able to recover by trying the

 

command again.

 

 

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M3099GX/GH OEM Manual